As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING A MAINTENANCE INSPECTION OF THE AIR CONDITION OVERHEAT SWICHES ON BOTH ACU FAIL THE TEST, FOUND INOPERATIVE, DURING THE FUNCTIONAL TEST AS REQUIRED BY THE MM PSP 601-2 , CHAP 21-51-3, P201, THIS CHECK IS REQUIRED AT EVERY 4800 HRS MCN 05-0000-04800. THERE IS NO POSSIBILITY OF TESTING THIS SYSTEM OTHER THAN THAT TEST THOSES PARTS ARE ON CONDITION.